Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Ellen Marie Tan, MFT (CA)

Marriage & Family Therapist in San Marino, CA · enumerated 2016.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1629438643

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ellen Marie Tan

Credential MFT (CA)

Sex Female

Practice address San Marino, CA, 91108

Phone (626) 458-2934

Enumeration date Mar 3, 2016

Last updated in NPPES Mar 3, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License CALMFT#23227 (CA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1629438643 active?

Yes, as of the latest NPPES snapshot, NPI 1629438643 is active (record last updated 2016-03-03).

How do I verify Ellen Tan's NPI record?

Cross-check NPI 1629438643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-03.